99412850565 has 72 divisors (see below), whose sum is σ = 201912511320. Its totient is φ = 45114015744.

The previous prime is 99412850539. The next prime is 99412850629. The reversal of 99412850565 is 56505821499.

99412850565 is a `hidden beast` number, since 9 + 9 + 4 + 1 + 28 + 50 + 565 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4660929441 + 94751921124 = 68271^2 + 307818^2 .

It is not a de Polignac number, because 99412850565 - 2⁶ = 99412850501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 137541 + ... + 466629.

It is an arithmetic number, because the mean of its divisors is an integer number (2804340435).

Almost surely, 2^99412850565 is an apocalyptic number.

It is an amenable number.

99412850565 is an abundant number, since it is smaller than the sum of its proper divisors (102499660755).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99412850565 is a wasteful number, since it uses less digits than its factorization.

99412850565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329251 (or 329241 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 54.

The spelling of 99412850565 in words is "ninety-nine billion, four hundred twelve million, eight hundred fifty thousand, five hundred sixty-five".